Noise barrier
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United States of America Patent
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Jun 13, 1989
Grant Date -
N/A
app pub date -
Sep 8, 1987
filing date -
Sep 8, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A noise barrier system having support members and noise absorbing panels is disclosed. The noise absorbing panels include a front corrugated perforated sheet and a rear corrugated solid sheet which define a chamber. A central sinusoidally corrugated perforated sheet is provided within the chamber. A first blanket of low frequency noise absorbing material is disposed adjacent the front face of the central member and is configured so that a resonance zone is provided between the first blanket and the rear surface of the front sheet. A second blanket of higher frequency sound absorbing material is provided between the rear surface of the central member and the front surface of the rear sheet.
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